/// <summary>
/// Whenver we change presence, send the new presence to the room, including
/// caps etc.
/// </summary>
/// <param name="sender"></param>
/// <param name="pres"></param>
private void m_stream_OnAfterPresenceOut(object sender, Presence pres)
{
Presence p = (Presence)pres.CloneNode(true);
p.To = m_room;
m_manager.Write(p);
}